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Jyutping gung1 geoi6 jan4
Pinyin gōng jù rén

Definitions (粵典–words.hk)
  1. 名詞、潮語
    任勞任​怨​,​一直​俾人​利用​、​好似​工具​咁​使​嘅​人
    a person used by others as a tool, doing errands for them without rewards; errand boy/girl; literally, tool person
    • 我日日都要幫佢地買飯,好似工具人咁。
      我日日都要帮佢地买饭,好似工具人咁。
      ngo5 jat6 jat6 dou1 jiu3 bong1 keoi5 dei6 maai5 faan6, hou2 ci5 gung1 geoi6 jan4 gam2.
      I order food for them every day, feel like being used as a tool.
  2. 近義詞
    觀音兵
Definitions (Wiktionary)
  1. noun, neologism, slang
    person used by others as a tool; cat's-paw; cat's-foot

工具人 [---]

Jyutping
Pinyin gōng jù rén

Definitions (CC-CEDICT)
  1. (neologism c. 2010) (slang) a person used by sb as a means to an end
Examples (粵典–words.hk)
  1. Cantonese
    我日日都要帮佢地买饭,好似工具人咁。
    我日日都要幫佢地買飯,好似工具人咁。
    ngo5 jat6 jat6 dou1 jiu3 bong1 keoi5 dei6 maai5 faan6, hou2 ci5 gung1 geoi6 jan4 gam2.
    • I order food for them every day, feel like being used as a tool.